You may use “fetch as Googlebot” feature of Google webmaster which will help you identify problematic areas.Here’s the man himself helping you diagnose drop in rankings.http://www.youtube.com/watch?v=gx04qNrCbnk

You may use “fetch as Googlebot” feature of Google webmaster which will help you identify problematic areas.Here’s the man himself helping you diagnose drop in rankings.http://www.youtube.com/watch?v=gx04qNrCbnk

When you make major changes, like you did, to 12 pages, that will cause a drop in rankings, but if you are doing everything okay, then have patience and build some links to your site.

Hi,Are you sure about that, whatever changes you have made are relevant?The changes you have put on your pages is in large amount, if you are sure that the changes are right from SEO perspective and good for your site then start working off-page SEO, you will again got your ranking back for sure.

Actually If you update your Meta Tags or URL with a change of more than 80% it usually push all the pages out of top ten for a short time. You should wait for a while if you've done a great job you'll be ranked again in top search results.